soc: qcom: add support for fingerprint sensor driver

The QBT1000 driver provides an API for communicating
with trustzone applications and handles firmware event
interrupts.
The driver supports the following features:
 - loading and unloading trustzone applications.
 - sending commands to trustzone applications.
 - voting/un-voting for clocks before/after making
   a trustzone call.
 - receiving firmware events, signalled by interrupts,
   and providing them to the driver client.
 - sending a key event in response to firmware finger
   detect events.
 - support for multiple IPC messages.
 - retry logic for CBGE interrupt handling.
 - remove clocks on/off logic.

This is snapshot of the qbt1000 driver as of msm-4.4 kernel base
'd93c68b1f0bd (soc: qcom: add support for fingerprint sensor driver)' .

Change-Id: I59b4294285edab6e4916528a31d0713d06d5a072
Signed-off-by: Abir Ghosh <abirg@codeaurora.org>